Rowan Astronomy HEQ5 Pro Belt Modification Kit

This kit replaces the factory spur gear drive train with timing belts.
The pulley modification reduces the spur gear errors that are typical and therefore reduces tracking errors. The belts also make slewing much quieter eliminating the 'grinding' noise that the standard spur gears produce.

The pulley ratio is the same as the factory gears. This means the Synscan hand controller is unaffected by this upgrade. All Synscan functions will operate as before.

The kit comprises of -
2 x 47 tooth pulleys. 2 x 9 tooth pulleys.
2 x timing belts.
2 x intermediate rollers. 2 x 5mm mounting shafts.
1x 8mm white acrylic cover spacer + 6 stainless fixings.

An optional pinion extractor tool is available to allow
the pinion gear to be removed easily from the motor.


Older mounts will require a small additional step to install the belt kit.

Please check if your mount has the hexagonal head on the transfer gear shaft shown in the photo below left.
In this case the hole in the motor mounting plate will require, either to be drilled through 5.0mm or the idler pin shortened and fixed in place with a spot of epoxy.
Later mounts have a round head on the transfer gear shaft and the motor mounting plate will not require modification- photo below right.

Technical Specifications

Fits Sky-Watcher HEQ 5 mounts

In the Box

2 x 47 tooth pulleys. 2 x 9 tooth pulleys.
2 x timing belts.
2 x intermediate rollers. 2 x 5mm mounting shafts.
1x 8mm white acrylic cover spacer + 6 stainless fixings.